Examples with HostMatcher com.spotify.helios.master.HostMatcher used on opensource projects

Example 1 with HostMatcher

use of com.spotify.helios.master.HostMatcher in project helios by spotify.

the class HostsResource method list.

/**
 * Returns the list of hostnames of known hosts/agents.
 *
 * @return The list of hostnames.
 */
@GET
@Produces(APPLICATION_JSON)
@Timed
@ExceptionMetered
public List<String> list(@QueryParam("namePattern") final String namePattern, @QueryParam("selector") final List<String> hostSelectors) {
    List<String> hosts = namePattern == null ? model.listHosts() : model.listHosts(namePattern);
    if (!hostSelectors.isEmpty()) {
        // check that all supplied selectors are parseable/valid
        final List<HostSelector> selectors = hostSelectors.stream().map(selectorStr -> {
            final HostSelector parsed = HostSelector.parse(selectorStr);
            if (parsed == null) {
                throw new WebApplicationException(Response.status(Response.Status.BAD_REQUEST).entity("Invalid host selector: " + selectorStr).build());
            }
            return parsed;
        }).collect(Collectors.toList());
        final Map<String, Map<String, String>> hostsAndLabels = getLabels(hosts);
        final HostMatcher matcher = new HostMatcher(hostsAndLabels);
        hosts = matcher.getMatchingHosts(selectors);
    }
    return hosts;
}